[TechAssist] Re: Sony KV27EXR25 pulsing HV - not starting up
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 15 Oct 2005 22:47:13 -0400
I just closed the shop with one of those on the bench.
Mine's a EXR20 instead of a 25.
Replaced the STR and now it starts and immediately goes into shutdown. I can
hear the HV crackle but haven't had time to measure it.
I checked the 47@50, OK on all 4 tests.
Russ Hoyt
Hoyt's TV
Exeter, NH
----- Original Message -----
From: "Tel-Tek Electronics" <teltek3@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, October 15, 2005 5:59 PM
Subject: [TechAssist] Re: Sony KV27EXR25 pulsing HV - not starting up
> Peter;
> HV can't be present at the anode...
> Whatever means you are using to measure....I presume "2nd Anode"...
> 2nd anode doesn't discharge quickly enough to give an indication of
> anything.
>
> Probably a Regulator problem...KV27EXR25 and others have "Cap" problems.
>
> Look for C655 on the G PCB.
>
> 47ufd/50Volts.
>
> -Ed-
>
> Tel-Tek Electronics
> Ontario-Canada
>
> teltek3@xxxxxxxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Peter oliver
> Sent: Saturday, October 15, 2005 5:07 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Sony KV27EXR25 pulsing HV - not starting up
>
> Sony
> KV27EXR25
>
> Ran into an odd problem: This set seems to be attempting to
> start,
> the HV pulses repeatadly but the set never fires up. the STRS6301 has
> been
> replaced, and connections touched up on the power sypply, Vert IC,
> HDT,....
> The frequency of the sound the pulse makes sounds high although the 200v
>
> supply only makes it to ~115v during a pulse. HV is present at the
> anode.
>
> Peter Oliver
> Tucson Radio TV
>
>
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